【BONE CONDUCTION TECHNOLOGY】Sandoo conduction headphones are designed to convert sounds via ear bone into vibrations that can be received directly by the cochlea, which bypasses the eardrums to avoid hearing impairment. Perfect for people who wear headphones for the long term and need hearing first aid! 【OPEN-EAR DESIGN】Thanks to the bone conduction technology, the open-ear design allows you to enjoy the music and keep alert to the environment dangerous at the same time. You can remain open for other pedestrians, passing cars, and any other potential hazards. Bluetooth 5.0 version to get more stable and fast transmission. 【COMFORTABLE WEARING EXPERIENCE】Sandoo bone conduction headphones are lightweight to ensure wear comfortable when workout. The flexible frame and soft silicone designed for long-term wear. IPX 5 waterproof to resist water, perfect for jogging, running, hiking, cycling and etc. 【6H LONG BATTERY LIFE】Equipped with a long life battery allows you to enjoy music up to 6 hours on per charge. 2 hours charge time to get full 6 hours playing time. 【WARRANTY】As a reliable seller, Sandoo provides 30-days no worry return and 1-year manufacturer warranty.